diff --git a/test/hotspot/jtreg/compiler/loopopts/TestLoopIncrNoOverflow.java b/test/hotspot/jtreg/compiler/loopopts/TestLoopIncrNoOverflow.java new file mode 100644 index 0000000000000..a95c26b6a5eeb --- /dev/null +++ b/test/hotspot/jtreg/compiler/loopopts/TestLoopIncrNoOverflow.java @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test + * @bug 8308504 + * @summary With JDK-8303466 the unroll-limit became more precise, and does not overflow. + * We must ensure that the type of the loop incr also does not overflow. + * @run main/othervm -Xcomp -XX:-TieredCompilation + * -XX:+UnlockDiagnosticVMOptions -XX:RepeatCompilation=100 + * -XX:+StressIGVN + * -XX:CompileOnly=compiler.loopopts.TestLoopIncrNoOverflow::test + * compiler.loopopts.TestLoopIncrNoOverflow + */ + +package compiler.loopopts; + +public class TestLoopIncrNoOverflow { + static int N; + + static void test() { + int arr[] = new int[N]; + short s = 1; + double d = 1.0; + for (int i = 49; i > 8; i--) { + for (int j = 7; j > i; j -= 3) { + if (i == 8) { + s *= arr[1]; + } + d = arr[j]; + } + } + Double.doubleToLongBits(d); + } + + public static void main(String[] strArr) { + for (int i = 0; i < 10_000; i++) { + test(); + } + } +}